Modify programs that require long command lines so that they use a file that contains the parameter information, and then include the name of the file in the command line.įor example, instead of using the ExecutableFile.exe Parameter1 Parameter2. To work around the limitation, use one or more of the following methods, as appropriate to your situation: For more information about the SetEnvironmentVariable function, see SetEnvironmentVariableA function. In a batch file, the total length of the following command line after you expand the parameters can't contain more than 8191 characters: ExecutableFile.exe parameter1 parameter2Įven though the Win32 limitation for environment variables is 32,767 characters, Command Prompt ignores any environment variables that are inherited from the parent process and are longer than its own limitations of 8191 characters (as appropriate to the operating system). In Command Prompt, the total length of EnvironmentVariable1 after you expand EnvironmentVariable2 and EnvironmentVariable3 can't contain more than 8191 characters: c:> set EnvironmentVariable1 = EnvironmentVariable2 EnvironmentVariable3 This limitation applies to command lines that are contained in batch files when you use Command Prompt to run the batch file. In a batch file, the total length of the following command line can't contain more than 8191 characters: cmd.exe /k ExecutableFile.exe parameter1, parameter2. In Command Prompt, the total length of the following command line can't contain more than 8191 characters: cmd.exe /k ExecutableFile.exe parameter1, parameter2. The following examples show how this limitation applies to commands that you run in Command Prompt, and commands that you use in a batch file. If you use Command Prompt to run batch files, this limitation also applies to batch file processing. individual environment variables that are inherited by other processes, such as the PATH variable.The maximum length of the string that you can use at the command prompt is 8191 characters. It also provides methods that you can use to work around this limitation.Īpplies to: Windows Server 2012 R2, Windows Server 2008 R2 Service Pack 1, Windows 7 Service Pack 1 Original KB number: 830473 More information This article discusses the limitation to the length of the strings that you use from the command prompt in Command Prompt (Cmd.exe).
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